Pump.



No. 783.990. PATENTED FEB. 28, 1905. J. BEWSHER;

PUMP.

APPLICATION FILED MAR. 12, 1904.

mums-3mm 1 2 SHEETS-11331 2.

PATENTED FEB. 28, 1905" J. BEWSHERH PUMP.

APPLICATION FILED MAE-12, 1904.

'ivirn TATES Patented February 28, 1905.

FFICE.

CONSTRUCTlON COMPANY,

OF SEATTLE, W ASH'INGTON.

PUMP.

SPECIFICATION forming part of Letters Patent No. 783,990, dated February 28, 1905. Continuation of application Serial No. 158,684, filed October 3, 1902. This application filed March 12, 1904. Serial No- 197,786.

To all who/1t it nut cancel-It:

Be it known that l, JAMns Bnwsiinn, a citizen of the United States, residing at Seattle, in the county of King and State of \Vashington, have invented certain new and useful improvements in Pumps, of which the following is a specification.

My invention relates to new and useful improvements in the construction of pumps, and relates more particularly to pumps for handling liquids containing more or less granular material; and my invention consists in the matter hereinafter described, and pointed out in the appended claims.

The objects of my invention are to provide an improved form of pump adapted for pumping or handling liquids containing more or less granular n'1atorialas, for instance, in re moving spoil from the bottom of bodies of water or elevating liquids from mines; and it consists, essentially, in providing in such a pump a plurality of chambers, so constructed and assembled that the elevated admixture of fluid and spoil shall be discharged in a positive manner and to provide means whereby the plunger-s employed are cleansed of all clinging matters or particles of the granular material handled, so as to avoid abrasion of said plunger-s and their stufling-boxos as said plunger-s are reciprocated, and further means whereby air which may accumulate in the pum wchambers shall be expelled and discharged into the discharge-chainber, so as to assist in the delivery of the materials passing therethrough, and, further, to provide for the more perfect operation of the valves controlling the admission of the elevated materials to the several chambers. I attain these objects by the construction and combination of parts illustrated in the accompanying drawings and hereinafter fully set forth.

Referring to said drawings, Figure 1 is a central longitudinal vertical sectional view of a float or scow of catamaran type and illustrating the pump in position and portions of the walls of the chamber and the piping broken away to better disclose the arrangement of parts. Fig. .2 is a top plan view of the same, illustrating the pump as restored and portions l of the bulls of the float indicated in position to support the same. Fig. 3 is a vertical sectional View, on a large scale, of the valve and seat employed at the ends of the pipes discl'iarging into the several chambers of the pump, and indicates the angular valve in position. Fig. 4 is a top plan view of the same. Fig. 5 is a vertical central sectional view, on a large scale, of the upper end of one of the suction-chambers indicating the flushing device and the air-relieving device.

Similar characters of reference designate like parts of ti 2 structure throi'ighout the several views of the drawings.

Referring more particularly to said drawings, the numeral 2; designates opposite suction-chambers conveniently arranged in vertical positions and said chambers being of equal capacities and the capacity of each chamber being considerably greater than the displacement of its plunger l. The plungers a are arranged to reciprocate in suitable stulfing-boxes 5, communicating with theinteriors of said suction-chambers 3, and said plungers have operative connections with opposite ends of a suitable lever conveniently arranged in the form of a walking-beam, as (i, or other suitable means, \vhercbysi multaneous butopposite reciprocations are imparted to the plunger-s.

An intermediate discharge-chamber 7 is conveniently located at any suitable point between the suction-chambers 3 and is convenientl y made of substantially the same capacity as each of said suction-chambers and communicates at its lower end with the lower ends of both suction-chambers by means of suitable pipes, as 13.

Suitable suction-pipes, as 11, extend into and communicate with the lower portions of the chambers 3, as clearly shown in Fig. l, and said pipes communicate with and receive their supply from a main suction-pipe 12. Upon the inwardly-extending ends of the pipes 11 and 13 are secured valve-bodies, as 8 and 9, respectively, which bodies are pro vided conveniently with oblique or inclined valveseats for engagement with suitable clack-valves, as 10, constructed and arranged as will be presently described. A dischargepipe, as 1 1, communicates with the lower part of the discharge-chamber 7, as in Fig. 1, and is arranged to suitably convey the elevated admixture away from the pump to a de- 2 sired point. An air-relief pipe, as 15, provided with a check-valve, as 16, leads-from the upper part of each suction-chamber 3 and preferably communicates with the upper part of the discharge-chamber '7, as by the connection As shown in Figs. 1 and 5, said air-relief pipe preferably communicates with the suction-chamber through the medium of an auxiliary chamber 40 in the head or top wall of the suction-chamber.

In or adjacent to the stuffing-boxes 5 at the upper end of each suction-chamber 3 is formed an annular chamber, as 17, arranged around the outside of the plunger 4t, so as to leave an annular space or passage 18 between its inner wall and the outsideof the plunger 4, and the inner wall of said annular chamber is provided with suitable discharge, as apertures 19, for the passage of liquid therethrough. A pipe 20 communicates with said annular chamber 17 and leads to a source of supply of pure water and is provided with a check-valve, as 21.

Each valve 10 preferably consists of a diaphragm, as 25, of leather "or other suitable flexible material, arranged to extend for a considerable distance beyond the outer surface of the valve-body 8 or 9, as the case may be, and is suitably secured to a projection 22 on the valve-body, as shown more particularly in Figs. 3 and t, by means of screws or bolts 26. Upon the inner and outer surfaces, respectively, of the diaphragm 25 are located metal reinforcing-plates 27 and 27, the former of which is conveniently formed and arranged to drop within the-seat when the valve closes and the latter plate being preferably of approximately the same size as the part of the flexible member which engages with the valve-seat, and thus leaving the projecting portion of the same free to bend in the opening and closing movement of the valve.

The numerals 3O designate the parts of the float or other means of support to which the several pump-chambers 3 and T are secured by suitable supporting-ln'ackets 31, as shown.

The walking-beam 6 is secured to an oscillating shaft 32, trunnioned in suitable bearings 33, formed upon or attached to suitable supporting-brackets 34, which may, if desired, be mounted upon the upper portions of the pumpchambers, and an oscillating crank is rigidly secured to said shaft 32 at one end and has an operative connection at its other end with a connecting-rod 36, which rod is arranged to reciprocate by means of any suitable actuating mechanism, as by means of a wrist-pin 37, upon a rotating gear 38, meshing with a pinion 39, carried by a shaft L1, to which power is applied by any suitable motor.

. as described.

and 9 open inwardly into the respective chambers in which they are placed and seat with outward pressure, so as to permit free ingress of the elevated material and prevent outward flow of the same therethrough.

It follows from the foregoing construction that as each plunger rises suction is created in the relative suction-chamber, and the suction-pipe 12 being submerged at its outer end in the fluid to be elevated and extending to or near to the bottom thereof fluid, together with more or less of the granular material resting at the bottom of the fluid, will be elevated by suction and caused to flow through the pipe 12 and the branch pipe 11, communicating with the chamber 3, in which the ascending piston is located. W hen the plunger has reached the limit of its upward movement, the valve 8 will close to prevent return flow of the elevated admixture into the suction-pipe in an obvious manner, and as said plunger is driven or forced downwardly'a portion of said admixture will be forced out through the discharge-opening in said chamber and through the relative pipe 13 and into the dischargechamber 7. By the opposite but simultaneous reciprocation of the plungers one plunger will always descend while the other ascends, and vice versa, and hence the elevated admixture will be constantly fed from the suctionchambers into the discharge-chamber and thence out through the discharge-pipe.

As illustrated in Fig. 1 of the drawings, the lower portions of the chambers 3 and 7 are conveniently made tapering toward the bottom of discharge ends thereof and are preferably contracted at said lower ends to admit the diameters of the respectivepipes communicating therewith, so as tofacilitate the passage of the admixture from said chambers into said pipe. By this construction spoil or other granular material is enabled to gravitate naturally toward the discharge-openings in said chambers, and no portion of such material is permitted to lodge within the respective chambers, as would be the case if the lower ends of said chambers were formed otherwise than It will further be observed that by the described construction (if the valvebodies and the valves, the seats for the valves being formed obliquely with respect to the lengths or bores of the tubular valve-bodies, said seats and the valve-openings. are made in the form of ellipses, which manifestly have a greater area than the bores of said valvebodies, and hence a greater capacity for the discharge of the material, so that the move: ments of the valves in order to afford a free passage of the material being handled are materially reduced. Furthermore, by this arrangement the liability-of granular material accumulating or lodged between the valves and their seats is obviated, and said material is caused to drop off or away from said seats.

IIS

It will be observed that all of the valves 8 Furthermore, by the described arrangement I 3 "reaeeo of the valves an opening of considerable size is afforded between the edges of the valveseats and the hinges of the valves, which stlll further facilitates the escape of the granular material, and all liability ofsuch material lodging in the hinges of the valves, and thus interfering with a proper operation thereof, as would be the case if said valves were hinged directly to the sides of the valve-seats, is obviated.

By the described construction and arrangement of the annular flushing-chambers with the apertures communicating with the annular space next the outer or bearing surfaces of the plungers it is obvious that during each outgoing stroke of each plunger, whereby suction is created within the respective chamber to elevate the material, pure water will be drawn through pipe 20, check-valve 21, the flushing-chamber 1'7, and apertures 19, and thus into contact with the surface of the plunger, finally passing downwardly into the suction-chamber. By this means all clinging particles of granular material will be washed off from the surfaces of the plunger-s, and the said surfaces are automatically If ush ed at each outgoing stroke and the liability of rapid wearing or abrasion of the said surfaces and of the stuffing-boxes by reason of the presence of such material thereby obviated. By this means greater durability of the working parts is insured and I. am enabled to construct a ma chine of the character described in which a close and tight lit between the plungers and their stuffing-boxes is insured.

By the described construction and arrangement of the air-relief pipes 15 and checkvalves 16, the said pipes communicating with the top of the discharge-chamber, it follows that during the downward strokes of the plungers iair which may have accumulated in the suction-chambers will be displaced, and thus forced into the upper part of the dischargechamber and will thus materially assist in the positive discharge of the admixture therefrom through the discharge-pipe 14. While I have illustrated and described the air-relief devices as communicating with the discharge-cl'lamber, yet it will of course be understood that such air-relief devices may without materially affecting the operation of the working parts be arranged to discharge into the open air, if preferred.

My improved pump is exceedingly simple in construction, having no intricate or complicated parts liable to get out of order, is very strong and durable, and constitutes a very efficient and satisfactory device, being especially adapted for pumping or handling liquids containing granular material, more especially being used in removing spoil from the bottoms of bodies of water.

What 1 claim as new, and desire to secure by Letters Patent, is

1. In a pump of the character described, the

combination of a suctiolrclialnber, a ]i)lL1l],Q,61 reciprocating therein through the stufiing-box or the like and having its portion upon the inner side of the stuliing-box free from contact with walls or the like, a secondary chamber about said plunger but out of contact therewith and having its wall adjacent to the plunger provided with perforations, said secondary chamber being upon the inner side of said stuffing-box, there being provided at the point below said perforations, an outlet for water discharged therefrom, a clean-water-supply pipe emptying into said secondary chamber, said supply-pipe and secondary chamber being so constructed that water is drawn therethrough by the outward movement of said plunger, and an inwardly-opening valve in said supply-pipe, substantially as described.

2. In a pump of the character described, the combination of a suction-chamber, a plunger reciprocating therein, a secondary chamber surrounding the plunger but out of contact therewith, the wall of said secondary chamber adjacent the plunger being provided with a series of perforations, and means for supplying said chamber with clean water and discharging the same therefrom through said perforations against said plunger, there being provided an outlet for the discharged water below said perforations substantially as set forth.

8. In a pump of the characterdescribed, the combination, with a pair of suction-chambers, an intermediate discharge-chamber, and pipes connecting the discharge portions of said chambers, of the plungers fitted to reciprocate through the opposite ends of the suctionchambers, an auxiliary chamber in the head or top wall of each chamber, a pipe leading from each auxiliary chamber to the dischargechamber and a check-valve in each of said pipes substantially for the purpose set forth.

4. in an apparatus of the character described, a suction-chaniber, a plunger reciprocating therein through the stuffing-box or the like and having its portion upon the inner side of the stuffing-box free from contact with walls or the like, a secondary chamber about said plunger but out of contact therewith, said secondary chamber being upon the inner side of said stuffing-box and opening upon the plunger, there being provided at a point below said opening of the secondary chamber, an outlet for water discharged therethrough, a clean-water-supply pipe emptying into said secondary chamber, said supply-pipe and secondary chamber being so constructed that water is drawn therethrough by the outward movement of said plunger, and an inwardlyopening valve in said supplypipe, substanof, a 'ilunger reeiprocatiugly mounted and in close contact with the stuffing-box adapted to l be projected into the enlarged portion of the suction-chamber, and means for admitting clean water below the stuffing-box surrounding the plunger but out of contact therewith so as to spray water upon the exterior of the plunger as the same ascends.

6. In a pump of the character described, the combination of a suction-chamber, a stuffing-box mounted in the upper end thereof, a plunger reciprocatingly mounted in the stufiing-box and a clean-water-spraying chamber below the stuffing-box surrounding the plunger to spray the sides of the plunger as the same ascends.

7. In a pump of the character described, the combination of a suction-chamber, a stuffing-box mounted in the upper end thereof, a plunger reciprocatingly mounted in the stuffing-box, a clean-water-spraying chamber below the stuifing-box and surrounding the plunger to spray the sides of the plunger as the plunger ascends, and means for supplying clean water to said spraying-chamber.

8. In a pump of the character described, the combination of a suction-chamber having an opening in the top thereof, a stuffing-box mounted in said opening, a plunger adapted l to reciprocate in and in close contact with said stuffing-box, an annular ring below the stufling-box and surrounding the plunger the portion of said annular ring surrounding the plunger being out of contact therewith and being provided with perforations, and a cleanwater supply in communication with said annular ring.

9. In a pump of the character described, the combination of a suction-chamber having an opening in the top thereof, a stuffing-box mounted in said opening, a plunger adapted to reciprocate and in close contact with said stufling-box, an annular ring below the stall ing-box and surrounding the plunger, the portion of said annular ring surrounding the plunger being out of contact therewith and being provided with perforations, a pipe from a clean-water supply in communication with said annular ring and a check-valve mounted in the pipe adapted to stop the flow of clean water as the plunger descends.

In testimony whereof I aflix my signature in presence of two witnesses.

JAMES BE\VSHER. l Vitnesses:

J. M. VVRIGHT, J. M. MANGi-IUM. 

